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Water Quality Report

Monticello, IL

Piatt County · 5,641 residents · 2 water systems

6

Contaminants detected

0

PFAS compounds

—

Hardness (mg/L)

1

Above legal limits

2

Above health guidelines

Monticello drinking water comes from groundwater wells. Based on the most recent monitoring data, 6 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 2 others. PFAS testing has been conducted with no detections.

Contaminants detected in Monticello water

Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.

Lead0.001 / 0.015 mg/L
7% of EPA limit
Nitrate0.04 / 10 mg/L
0% of EPA limit
Arsenic0.0096 / 0.01 mg/L
96% of EPA limit
Copper1.4 / 1.3 mg/L
108% of EPA limit
Total Trihalomethanes57.5 / 80 ug/L
72% of EPA limit
62% of EPA limit
PFAS (tested — none detected)
Microplastics (not routinely tested)

Other cities in Piatt County

Water quality reports for nearby Illinois communities.

Frequently asked questions

Is Monticello, IL tap water safe to drink?
Monticello tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 2 above independent health guidelines. 6 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes. View the detailed report for each water system to see specific levels, how they compare to both legal limits and health guidelines, and what actions to take.
What contaminants are in Monticello water?
Monitoring has detected 6 contaminants in Monticello's water supply: Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). 1 of these are above EPA legal limits. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Monticello water have PFAS?
Monticello's water has been tested for PFAS compounds with no detections. Testing was conducted as part of the EPA's Unregulated Contaminant Monitoring Rule (UCMR5) program.
Where does Monticello get its drinking water?
Monticello's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Monticello is served by 2 water systems, the largest being MONTICELLO (serving 5,548 people).

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